sql其中x = y和x = z以及

Question

@English isn't my first language.

I have a code (it's working) :

@Query("select new java.entity.dto.ProductsDTO(" +
        "p," +
        "count(c)," +
        "sum(case when c.user = :user then 1 else 0 end) > 0," +
        "sum(case when cart.user = :user then 1 else 0 end) > 0," +
        "sum(case when wish.user = :user then 1 else 0 end) > 0) " +
        "from Products p " +
        "left join p.commentaries c " +
        "left join p.carts cart " +
        "left join p.wishLists wish " +
        "left join p.tags tags " +
        "where p.categories = :categories " +
        "and tags.id in :tags " +
        "group by p,:user")
Page<ProductsDTO> findAllByCategoriesAndTags(Pageable pageable, @Param("categories") Categories categories, @Param("user") User user, @Param("tags") List<Long> tags);

As I read this part "tags.id = :tags " working like : "id = tag1 or id = tag2 or id = tag3 ...".

So, how can I write somt thing like this : "id1 = tag1 or id1 = tag2 and id2 = tag1 or id2 = tag2"

Answer 1

As I read this part "tags.id = :tags " working like : " id = tag1 or id = tag2 or id = tag3 ...".

So, how can I write somt thing like this : " id1 = tag1 or id1 = tag2 and id2 = tag1 or id2 = tag2 "

Simply append another AND statement after the already existing one :

    AND tags.id1 in :tags 
    AND tags.id2 in :tags

I assumed you meant " (id1 = tag1 or id1 = tag2) and (id2 = tag1 or id2 = tag2) ". Be careful, though, about the fact that AND logical operations take precedence over OR ones. Without brackets, your expression would have been parsed as " id1 = tag1 or (id1 = tag2 _and_ id2 = tag1) or id2 = tag2 "…